Review on 🖨️ GREENBOX 15 Pack Compatible Ink Cartridge Replacement for Canon PIXMA Printers - Canon 280 281 PGI-280XXL CLI-281XXL: TR7520 TR8520 TS9120 TS6120 TS6220 TS8120 TS8220 TS9520 TS9521 by Sam Calderon

It seems that not all ink cartridges are made to the same dimensions as genuine Canon cartridges. Some of these cause jams when the ink cartridges get stuck in the printer because they are just a few millimeters higher than the height. Cartridges that fit work well, but the 280 XXL cartridge (which seems to do most of the greyscale work) has jammed 2 out of 3 times since I've replaced it. Will have to go with the Canon brand as it's unsustainable.